雨林在全球生态系统中起着重要作用。但是，由于几个原因，它们的重要区域正面临森林砍伐和退化。创建了各种政府和私人计划，以监视和警报遥感图像增加森林砍伐的增加，并使用不同的方式处理显着的生成数据。公民科学项目也可以用于实现相同的目标。公民科学由涉及非专业志愿者进行分析，收集数据和使用其计算资源的科学研究组成，并在科学方面取得进步，并提高公众对特定知识领域的问题的理解，例如天文学，化学，数学和物理学。从这个意义上讲，这项工作提出了一个名为Foresteyes的公民科学项目，该项目通过对遥感图像的分析和分类来使用志愿者的答案来监视雨林中的森林砍伐区域。为了评估这些答案的质量，使用来自巴西法律亚马逊的遥感图像启动了不同的活动/工作流程，并将其结果与亚马逊森林砍伐监测项目生产的官方地面图进行了比较。在这项工作中，在2013年和2016年围绕着Rond \^onia州的前两个工作流程收到了35,000美元以上的$ 383 $志愿者的答复，$ 2,050 $ 2,050 $在发布后仅两周半就创建了任务。对于其他四个工作流程，甚至封闭了同一区域（Rond \^onia）和不同的设置（例如，图像分割方法，图像分辨率和检测目标），他们收到了$ 51,035美元的志愿者的答案，从$ 281的志愿者收取的$ 3,358 $ $ 3,358 $任务。在执行的实验中...

Content moderation is the process of screening and monitoring user-generated content online. It plays a crucial role in stopping content resulting from unacceptable behaviors such as hate speech, harassment, violence against specific groups, terrorism, racism, xenophobia, homophobia, or misogyny, to mention some few, in Online Social Platforms. These platforms make use of a plethora of tools to detect and manage malicious information; however, malicious actors also improve their skills, developing strategies to surpass these barriers and continuing to spread misleading information. Twisting and camouflaging keywords are among the most used techniques to evade platform content moderation systems. In response to this recent ongoing issue, this paper presents an innovative approach to address this linguistic trend in social networks through the simulation of different content evasion techniques and a multilingual Transformer model for content evasion detection. In this way, we share with the rest of the scientific community a multilingual public tool, named "pyleetspeak" to generate/simulate in a customizable way the phenomenon of content evasion through automatic word camouflage and a multilingual Named-Entity Recognition (NER) Transformer-based model tuned for its recognition and detection. The multilingual NER model is evaluated in different textual scenarios, detecting different types and mixtures of camouflage techniques, achieving an overall weighted F1 score of 0.8795. This article contributes significantly to countering malicious information by developing multilingual tools to simulate and detect new methods of evasion of content on social networks, making the fight against information disorders more effective.

Spacecraft pose estimation is a key task to enable space missions in which two spacecrafts must navigate around each other. Current state-of-the-art algorithms for pose estimation employ data-driven techniques. However, there is an absence of real training data for spacecraft imaged in space conditions due to the costs and difficulties associated with the space environment. This has motivated the introduction of 3D data simulators, solving the issue of data availability but introducing a large gap between the training (source) and test (target) domains. We explore a method that incorporates 3D structure into the spacecraft pose estimation pipeline to provide robustness to intensity domain shift and we present an algorithm for unsupervised domain adaptation with robust pseudo-labelling. Our solution has ranked second in the two categories of the 2021 Pose Estimation Challenge organised by the European Space Agency and the Stanford University, achieving the lowest average error over the two categories.

Traditionally, data analysis and theory have been viewed as separate disciplines, each feeding into fundamentally different types of models. Modern deep learning technology is beginning to unify these two disciplines and will produce a new class of predictively powerful space weather models that combine the physical insights gained by data and theory. We call on NASA to invest in the research and infrastructure necessary for the heliophysics' community to take advantage of these advances.

Training agents via off-policy deep reinforcement learning (RL) requires a large memory, named replay memory, that stores past experiences used for learning. These experiences are sampled, uniformly or non-uniformly, to create the batches used for training. When calculating the loss function, off-policy algorithms assume that all samples are of the same importance. In this paper, we hypothesize that training can be enhanced by assigning different importance for each experience based on their temporal-difference (TD) error directly in the training objective. We propose a novel method that introduces a weighting factor for each experience when calculating the loss function at the learning stage. In addition to improving convergence speed when used with uniform sampling, the method can be combined with prioritization methods for non-uniform sampling. Combining the proposed method with prioritization methods improves sampling efficiency while increasing the performance of TD-based off-policy RL algorithms. The effectiveness of the proposed method is demonstrated by experiments in six environments of the OpenAI Gym suite. The experimental results demonstrate that the proposed method achieves a 33%~76% reduction of convergence speed in three environments and an 11% increase in returns and a 3%~10% increase in success rate for other three environments.

Bi-encoders and cross-encoders are widely used in many state-of-the-art retrieval pipelines. In this work we study the generalization ability of these two types of architectures on a wide range of parameter count on both in-domain and out-of-domain scenarios. We find that the number of parameters and early query-document interactions of cross-encoders play a significant role in the generalization ability of retrieval models. Our experiments show that increasing model size results in marginal gains on in-domain test sets, but much larger gains in new domains never seen during fine-tuning. Furthermore, we show that cross-encoders largely outperform bi-encoders of similar size in several tasks. In the BEIR benchmark, our largest cross-encoder surpasses a state-of-the-art bi-encoder by more than 4 average points. Finally, we show that using bi-encoders as first-stage retrievers provides no gains in comparison to a simpler retriever such as BM25 on out-of-domain tasks. The code is available at https://github.com/guilhermemr04/scaling-zero-shot-retrieval.git

In this paper, we consider the problem where a drone has to collect semantic information to classify multiple moving targets. In particular, we address the challenge of computing control inputs that move the drone to informative viewpoints, position and orientation, when the information is extracted using a "black-box" classifier, e.g., a deep learning neural network. These algorithms typically lack of analytical relationships between the viewpoints and their associated outputs, preventing their use in information-gathering schemes. To fill this gap, we propose a novel attention-based architecture, trained via Reinforcement Learning (RL), that outputs the next viewpoint for the drone favoring the acquisition of evidence from as many unclassified targets as possible while reasoning about their movement, orientation, and occlusions. Then, we use a low-level MPC controller to move the drone to the desired viewpoint taking into account its actual dynamics. We show that our approach not only outperforms a variety of baselines but also generalizes to scenarios unseen during training. Additionally, we show that the network scales to large numbers of targets and generalizes well to different movement dynamics of the targets.

Age-related macular degeneration (AMD) is a degenerative disorder affecting the macula, a key area of the retina for visual acuity. Nowadays, it is the most frequent cause of blindness in developed countries. Although some promising treatments have been developed, their effectiveness is low in advanced stages. This emphasizes the importance of large-scale screening programs. Nevertheless, implementing such programs for AMD is usually unfeasible, since the population at risk is large and the diagnosis is challenging. All this motivates the development of automatic methods. In this sense, several works have achieved positive results for AMD diagnosis using convolutional neural networks (CNNs). However, none incorporates explainability mechanisms, which limits their use in clinical practice. In that regard, we propose an explainable deep learning approach for the diagnosis of AMD via the joint identification of its associated retinal lesions. In our proposal, a CNN is trained end-to-end for the joint task using image-level labels. The provided lesion information is of clinical interest, as it allows to assess the developmental stage of AMD. Additionally, the approach allows to explain the diagnosis from the identified lesions. This is possible thanks to the use of a CNN with a custom setting that links the lesions and the diagnosis. Furthermore, the proposed setting also allows to obtain coarse lesion segmentation maps in a weakly-supervised way, further improving the explainability. The training data for the approach can be obtained without much extra work by clinicians. The experiments conducted demonstrate that our approach can identify AMD and its associated lesions satisfactorily, while providing adequate coarse segmentation maps for most common lesions.

视网膜脉管系统的研究是筛查和诊断许多疾病的基本阶段。完整的视网膜血管分析需要将视网膜的血管分为动脉和静脉（A/V）。早期自动方法在两个顺序阶段接近这些分割和分类任务。但是，目前，这些任务是作为联合语义分割任务处理的，因为分类结果在很大程度上取决于血管分割的有效性。在这方面，我们提出了一种新的方法，用于从眼睛眼睛图像中对视网膜A/V进行分割和分类。特别是，我们提出了一种新颖的方法，该方法与以前的方法不同，并且由于新的损失，将联合任务分解为针对动脉，静脉和整个血管树的三个分割问题。这种配置允许直观地处理容器交叉口，并直接提供不同靶血管树的精确分割罩。提供的关于公共视网膜图血管树提取（RITE）数据集的消融研究表明，所提出的方法提供了令人满意的性能，尤其是在不同结构的分割中。此外，与最新技术的比较表明，我们的方法在A/V分类中获得了高度竞争的结果，同时显着改善了血管分割。提出的多段方法允许检测更多的血管，并更好地分割不同的结构，同时实现竞争性分类性能。同样，用这些术语来说，我们的方法优于各种参考作品的方法。此外，与以前的方法相比，该方法允许直接检测到容器交叉口，并在这些复杂位置保留A/V的连续性。

我们介绍MR-NET，这是一种用于多分辨率神经网络的一般体系结构，也是基于此体系结构进行成像应用的框架。我们的基于坐标的网络在空间和规模上都是连续的，因为它们由多个阶段组成，这些阶段逐渐增加了更细节。除此之外，它们是一个紧凑而有效的表示。我们展示了多分辨率图像表示以及用于纹理放大和缩小以及抗脉化的应用。